Early life history of cultured common dentex (Dentex dentex L. 1758)


Firat K. , SAKA S. , COBAN D.

TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES, cilt.29, ss.735-741, 2005

  • Cilt numarası: 29 Konu: 3
  • Basım Tarihi: 2005
  • Dergi Adı: TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES
  • Sayfa Sayısı: ss.735-741

Özet

The early life history of common dentex (Dentex dentex L. 1758) was investigated under culture conditions. The percentage of fertilized buoyant eggs was generally high, between 80 and 85%. Egg diameters ranged from 0.938 to 1.089 mm. Larval development, growth, and some morphological changes were described from day 0 to day 32. Larvae were reared intensively in 6 m(3) tank under a constant photoperiod (24 h light), and fed initially on rotifers, followed by Artemia nauplii and Artemia metanauplii. A green water technique was applied using Nannochloropsis sp., Chorella sp., and Isochfysis sp. at a density of 150,000-200,000 cells ml(-1). First feeding began on day 6. Larvae completed yolk absorption on day 8 after hatching at 136 degrees C cumulative temperature (day/degrees). Swimbladder inflation occurred between day 5 and day 7 post-hatching. Notochord flexion started on day 23 at 7.01 mm total length. Metamorphosis from larval to juvenile stage occurred between days 23 and 32 post-hatching at a mean total length of 12.7 mm.